Contains both daily (front files) and a (backfile) created annually of trademark assignments text derived from trademark assignment recordations from August 1980 to present made at the USPTO. The file format is eXtensible Markup Language (XML) in accordance with the U.S. Trademark Assignments Version 0.4 Document Type Definition (DTD).
Earlier trademark assignments can be found in USAMARK.
Visit the United States Patent and Trademark Office website for more information